Rare collectable cars are among car collectors’ most prized possessions. In fact, some manufacturers only produce a handful of some models, and the price tags are often out of this world, ranging in the tens of millions of dollars. Obviously, some of these extreme machines are so expensive that owners dare not even drive them and they remain parked, on display, a rich man’s trophy. But it’s sure fun to dream. Here are 10 of the rarest, most expensive cars on earth. 10. W Motors Lykan HyperSport With only seven cars ever produced and equipped with a 3.7 L twin-turbocharged flat-six engine, this 2013 limited-run supercar from W Motors is worth roughly $3.4 million, according to Rarest. 9. McLaren F1 LM A special racing edition of the regular McLaren F1, this sports car has a 6.1 L BMW S70/2 V12 engine and an estimated value of $25 million. The manufacturer …